First generation of AirPods Pro were the only in-canal earphones that didn't fall out of my ears (rare shape of ear canal and yes, I tried different sizes, they all fall out or don't fit).

Only have over-ears headphones, so I keep borrowing pods from my wife when I'm cleaning/exercising.

Was very disappointed when she lost them and the replacement - pro v3 - had fixed the rare shape and they started falling out like any other earbuds.